'Hyphen notation' presentation slideshows

Chapter 4

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Chapter 4

507 views • 30 slides

Unit 3 Review

Unit 3 Review. Hydrogen-2 and Hydrogen-3 are : Different elements Ions Isotopes nuclei. What sub-atomic particle has a positive charge ? Neutron Proton Electron quark. An atom has 20 protons, 21 neutrons, and 18 electrons . What element is this?.

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A. Atomic Mass

A. Atomic Mass. The average atomic mass is the number at the bottom of each square Found by averaging the natural abundances of its isotopes Atomic mass = # p + + n 0. Mass #. Atomic #. B. Isotopes. Atoms of the same element with different mass numbers. Nuclear symbol:.

838 views • 24 slides

3.3: Counting Atoms

3.3: Counting Atoms. How do I count and calculate the mass of atoms?. Counting Atoms. Atoms are far too small to be counted individually, so we use the concept of a weighted average. Suppose you need 1000 mints. Each mint weights 1 gram. How could you gather 1000 mints

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Isotopes

Isotopes. Atomic Number. Atomic number = number of protons Which makes it always a whole number Atomic number is always the same for a given element Can be found on the periodic table. Isotope. Atoms of the same element with different number of neutrons They have different mass numbers

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Atoms: The building blocks of Matter

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